<!DOCTYPE html>
<html class="reftest-wait">
<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>
<link rel="author" title="Andreu Botella" href="abotella@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-tables-3/#drawing-cell-backgrounds">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<meta name="fuzzy" content="maxDifference=0-1; totalPixels=0-4400">
<meta name=assert content="Changing the span of a table column element will invalidate column backgrounds">
<style>
table {
  width: 100px;
  height: 100px;
  border-spacing: 0;
}
.green {
  background: green;
}
.red {
  background: red;
}
</style>
<title>CSS table column span invalidation</title>
<script>
waitForAtLeastOneFrame().then(() => {
  const changeSpanCol = document.getElementById("changeSpan");
  changeSpanCol.setAttribute("span", "2");
  takeScreenshot();
});
</script>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<table>
  <col id="changeSpan" class="green">
  <col class="green">
  <col class="red">
  <tr>
    <td></td>
    <td></td>
    <td></td>
  </tr>
</table>
</html>
